public void ClearValues(DependencyTable table)
{
for (int i = 0; i < table.Columns.Count; i++)
{
table.Columns[i].Depth = 0;
table.Columns[i].RefersTo = null;
}
}
public DependencyColumn(Column column, DependencyTable table)
{
this.DatabaseGenerated = column.DatabaseGenerated;
this.DataType = column.DataType;
this.IsNullable = column.IsNullable;
this.MaxLength = column.MaxLength;
this.Name = column.Name;
this.NumericPrecision = column.NumericPrecision;
this.Table = table;
this.Depth = 0;
}
public List <DependencyTable> ConvertToDependencyTables(DatabaseContainer database)
{
List <DependencyTable> tables = new List <DependencyTable>();
List <ForeignKey> foreignKeys = new List <ForeignKey>();
database.Schemas.ForEach(s =>
{
foreignKeys.AddRange(s.ForeignKeys);
s.Tables.ForEach(t =>
{
DependencyTable table = new DependencyTable(t.Name, s.Name);
t.Columns.ForEach(c =>
{
DependencyColumn column = new DependencyColumn(c, table);
table.Columns.Add(column);
});
tables.Add(table);
});
});
return(tables);
}
public void BuildDependsOnList(List <ForeignKey> foreignKeys, List <DependencyTable> tables, DependencyTable tableToBuildFor)
{
Action <DependencyColumn> buildDependencies = null;
int depth = -1;
buildDependencies = (column) =>
{
// Find tables this column references
ForeignKey associatedForeignKey = foreignKeys.FirstOrDefault(x =>
x.Columns.Any(cn =>
cn.ForeignKeyColumnName == column.Name &&
cn.ForeignKeyTableName == column.Table.Name &&
cn.ForeignKeySchemaName == column.Table.Schema
)
);
depth++;
column.Depth = depth;
if (associatedForeignKey != null)
{
// find all fields on the table that we reference
var foreignKeyReferenceTable = tables.Where(x => x.Name == associatedForeignKey.Columns.First().PrimaryKeyTableName &&
x.Schema == associatedForeignKey.Columns.First().PrimaryKeySchemaName).First();
var primaryKey = foreignKeyReferenceTable.Columns.First(x => x.Name == associatedForeignKey.Columns.First().PrimaryKeyColumnName);
column.SetRefersTo(primaryKey);
//iterate the column on the referenced table looking for foreign keys that that table depends on
for (int i = 0; i < foreignKeyReferenceTable.Columns.Count; i++)
{
if (foreignKeyReferenceTable.Columns[i].Table != column.Table)
{
buildDependencies(foreignKeyReferenceTable.Columns[i]);
}
}
}
depth--;
};
tableToBuildFor.Columns.ForEach(x =>
{
buildDependencies(x);
});
}
